In general, I recommend learning the static mount (no rollback) anyway,
as it is applicable in more situations for the future. (MUni and big
wheel riding are both much easier with static mounts).
If you want to learn the rollback, most people start with their
dominant foot on the pedal. The key for the rollback is that the wheel
comes under you at the same time as you jump forward, and as you jump
up, you smack the other pedal backwards with your free foot.
For the static mount, again, most people start with their dominant foot
on the pedal (although I learned it the other way). You have to jump
up pretty high without putting much weight on the foot on the pedal;
it's not absolutely zero weight, because your jump will push the
unicycle forward. The amount of weight you put on the pedal is just
enough to counteract the force of your body pushing the unicycle
forward. Some people find it easier to think about keeping your leg
and knee in a locked position, rather than thinking about the weight on
the pedal.
For either mount, the more quickly you can get your second foot on the
pedal, the better.
And, of course, lots of practice. When I was first learning, I found
it impossible, and I gave up for a month or so. Getting more practice
riding around pedestrians helped my freemounting, as I had to learn to
be more comfortable on the unicycle when I was moving slowly.
--
tholub
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